Gate-operating mechanism.



J. E. 0. JAGOBSEN & c. A. v. I. SEGBRSTEN. GAT'E OPERATING MECHANISM. APPLIOATION FILED AUG; 30, 1911 1,087,770. Patented F'eb.17,1914.

a SHEETS-SHEET 1.

A k E; H

INVENTOHJ wmvessgs E323 ATTORNEYS J. B. O; JAUOBSEN & (LA. V. ,J. $EGERSTEN- GATE OPERATING MEGH'ANISM.

APPLICATION FILED AUG. 30, 1911.-

Patented Feb. 17, 1914.

6 SHEETS-SHBET 2.

yew-fem ATTORNEYS J. E. G. JAOOBSEN & G. A. V. J. SBGBRSTEN.

GATE OPERATING MECHANISM.

APPLIOATION FILED AUG. 30, 1911.

x Patented Feb. 17, 191';

J. E. U. JAGOBSEN & C. 'A VJJ. SEGBRSTEN. GATE OPERATING MECHANISM; APPLICATION FILED /A.UG"3O,19411' 1,087,770 Patented Feb.'17,-1914.

6 SHEETS-SHEET 5.

J. E. U. J'ACOBSEN & O. A. V. J. SEGBRSTBN.

GATE OPERATING MECHANISM.

APPLICATION FILED AUG. 30, 1911.

1,087, Patented Feb. 17,1914

6 SHEETS-SHEET 6.

m n N I 10 I \QJ ATTORNEYS rATEnT OFFICE.-

c. aaoonsan' AND onannns A. v. if. snennsrnn, or NYACK, new roan.

- 1 earn-cremains 'MEcnANISmQ Specification of Letters Patent.

Applicationnled August 30, 1911. Serial No. 646,799.

ot Nyack, in the county ofRockland and State of New Yorlnhave' invented a new and limproved Gate-Operating. Mechanism, of

sits SSqaoction onthe line t n-12 of hi which the following-is a full, clear, and exact description.

@ur invention relates to gate-operating mechanism and is intended more particularlyfior railway use at crossings, street iii- 'tcrsections and upon bridges .and the like.

-More particularly stated, our invention comprehends mechanism whereby a train in approaching a predetermined part of a track provided with. gates, will cause the gates to close. automatically, will actuate lamps serving as alarms, and will retain the- 20 gates closed and'the alarm active so long as the train is present, but when the train dearts on it's Qurne the ates are autos matic'ally openedand thej alarm rendered inactive. g

Reference is ,to be had to the accompany ing drawings,forming a part of this specification, in whichsimilar characters of referenceindicate corresponding parts in all the figures, and 1n wh1ch Figure 1 is athplan' View, partly diagram- -htrtic, showing in a generalwa y, the arrangement of j.the gate-operating mechanisin; Fig. 2 is a detail showing in plan, part of the gearing used more particularly for raising and lowering the gates; Fig. 3 section on the line 3-3 ofFig. 2 looking iii. therdirect-ion of the arrow; Fig. 1 is a section on the line 4 t4 of Fig. 2 looking in ,the direction of the arrow; Fig. 5 is a detail showing how part of the alarm mechanism is actuated; Fig. 6 is a, detail showlng a ratchet.- used for holding a part ofthe gateoperating mechanism temporarily in a predetermined position; Fig. 7 1s a sectlon on. the line 7 a? of Fig. 6 lookingm the threetion of the arrow; Fig. 8 is a plan vlew of a relay forming a part of our mechanism; Fg. .9 is a vertical section taken on the line 9-+9 of Fig. 10 looking in the dlrect on of the arrow and showing the construct on of this relay; Fig. 10 is aside elevatlon of the relay;"Fig. 11 is a vertical S eCt10I1 fl1I0l1ghf one of the gate casings and 1s taken on the line 11--11 of Fig. 12; Fig. 121s a vertical ook g,

' lftl ndirection oi the arr-or? Patented Feb.17, 1914..

section through thegate casing, the movable parts having been removed; Fig. 1 1 is a v ew partly in elevation and partly in section-showing more particularly a gate and gate casing; and Fig. 15 is a diagram ofthe electrical-connectionsi i Each gate 16 is mounted upon and supported by a casing 17, which contains varlous op.-

erative parts. as hereinafter described. The,

gate-controlling.mechanism is for the most.

part'loc'ated w thin a casing 18 and is dis-..

tinct from the gate-operating mechanism. An electric motor 19 is used for actuating the gate-controlling mechanisin-and 'indially connected with the cross bar 25. Se

cured to this cross bar is a strap 26 of spring metal, leather or other appropriate mate rial for pulling the bar sidewise in order to ;move the cords 21. The springs 24 are for the purpose of cushioning this movement,

The cables 21 enand forequalizing, ina measure, the strains upon the cables 21. The gates 16 are severally provided, attheir outer ends, with electric lamps 27. A crossing is shown'at- 28, and at 29, 30,31, 32 are shown the rails of a double railway track.

'Each gate 16 is provided with a number of pendant rods 28 and pivotally connected with the latter is a bar'29' of considerable length. When the ate'swin'gs downwardor is closed (see Flg. 14), the bar 29 byhanging as shown, makes the gate practicallyia little wider or rather a little deeper than would otherwise be the case. Extending through the gate for the purpose of supporting the same, is a shaft 30 and rig-' idly mounted upon the latter is a pulley 31.

The shaft 30 (see Fig. 12) is supported. upon conical pointed bolts 65, WlllCh arosecured upon the casing by aid of nuts 66, 67.

A handle 68 is provided with the door 37, to enable the operator to remove the latter readily. A cord 21 is wound partially --around the pulley 31 and. secured directly thereto, this cord also engaging a pulley 33.

ncnnterweight having generally the form of a sector, is by aid of fastenings adjustably mounted upon the pulley 31 By'loosening the faste'nings 39, the counterit to its normal position weight 34 may be moved into different positions relatively to the pulley 31*- and then tightened securely in position- Another counterweight-35 is by aid of apivot pin 36, mounted upon the. gate casing. The

weight of these two counterweights is sufcated in the upper portion of the casing which is rounded as will be understood from Fig. 14. A door 41 having generally an arcua te form, is fitted upon this roundedportion and is provided with a flange 42 extendin'g radially outward. This door 41 engages the convex outer surface of a portion 17 a of the casing when it is in open position, as shown in Fig. 14, and mov es along guides 17", which engage the vertical edges thereof when the door 41. is moved away from the portion 17 0f the casing, these guides 17 merely forming extensions of the vertical edges of the portion 17 Another door43, also, ofarcu ate form but larger in one direction than the door. 41, is provided at its lowenend with a flange. 44 bent inward and adapted to engage the flange 42. The door 43 is mounted directly upon the gate 16 and carried thereby.

, \Vhen the gate 16 moves-upward it causes 'the door 43 to turn upon the same center of rotation as the gate, but when the flange 44 engages the flange 42,the.door 41 is lifted and travels with the door 43. The two doors 41 to ether lree I the o enin 1 a b closed. The purpose of this arrangement is to eXclu-de'rani, snow, dust and dirt from the casing and mechanism contained therein, yet allowing full freedomof movement for the gate.

' leads to wires 52,

A battery is shown inFig.-15, and connected to this battery'is a wire 46, this wire being connected to .two other wires 47 4S Thewir'e 47 is secured to the rail 29 and the wire 48 is similarly connected to the rail 32. A wire 49 is connected with the bat-tery'45 and with a relay magnet 50-. A wire 51 is connected with-this magnet and the wire being connected with the rail 30 andthe wire 53 leading to therail 31.. v

The structure of the relay will be-understood more -particul ly by reference to Figs. 8,, 9 andlO. ature is shown at 54 An a n and contact bars 55, 56 are movabl by aid of this armature. T,h'e relay magnet is sup.- ported upon a ase 57 of insulating material.

Mounted upon. posts 58, are four contactmembers 59, 60, .61 and-62. Connected with the contact members 59, 61, which are stationary, are two wires 63, 64, and'connected with the contactmembers 60, 62', are wires 60?, 60", which-lead to the motor 19. Connected with the wires 60, 60, are two other wires 60, 60 which leadto the respective lamps 27,the latter being parallel with each other, as will be understood from Fig. 15. g The relay shown in Figs. 8, 9 and 10, is provided with abar'92 of insulating materiahthis bar being mounted rigidly upon two rods 94-, the latter being se ired rigidly upon the :base 57. Another ba'i' 93 of in-' su-lating material slidably mounted relative to .the rods 94. Spiral springs 95 encircle the rods '94 and engage both the base 57 andthe bar 93. Whenever the-magnets 5 0 are energized, they attract the armature 54,;which carries with itthe bar 93 and contact tongues-55, 56, so that these tongues are brought into engagement with the stationar contact members with which they are as ociated-..,

The gate-controlling mechanism contained within the vcasing 18 (see Fig. 1') is -shownm'ore particularly in Figs'j2, 3 and 4. A. horizontal shaft 69 is mounted in bearings-70,71, and is provided with a fixed pulley 72, whereby it may be rotated. The shaft 69 is further provided with a bevel gear 73 secured rigidly upon it. liiounted fixedly upon the approximate middle por-- I ticn of the shaft' 69 is a worm 74. Meshing collar 8 1;the rods 82, 83 being journaled to a collar 84. The collar 84"is fixed upon the shaft 7 6, but the collar 81 is loose upon said -shaft.- An eccentric. 85 is mounted upon the shaft 76 and connected with this eccentric.

with the bevel gear 73 is another bevel gear i 10%:- a sphericalsform, are mounted upon rods. SO, 82-, 83,. the rods 80 being journaled to a is a rod-8 6. whicheXtends upwardly as will be understoodfrom Fig. 5. Pivotally connected with the rod 86 is another. rod 87,

the latter at' its top being pivotally con-l nected to a pitman 8S, and connected with thispitman is ahammer 89. Adjacent to.

this hammer is'a gong 90. (see upper lefthand corner of Fig. 1), which is repeatedly struck by the hammer whenever the ecccn tric...;85 is operated the rotation of. the

shaft 76. A post 91 (see Fig. 5,) is conveniently used for supporting the various I rods 86,- 87, S8, gong 90 and hammer S9.

The worm 74 meshes with a worm wheel "96 ee Fig. 4), which is mounted loosely upon a shaft 97 and normally turns upon this shaft without rotating the latter. A. cotter pin 98 extends through the shaft- 9'? iEO adjacent one end thereof and revents the win wheel from moving to t e right ac- .ment relatively tosaid shaft while partaking of its rotation. Encircling theclutch member 100 and loose relative thereto, is'a collar 101, and pivotally connected with this collar is an arm 102,-said arm being also piv'ot'ally connected to a lever 103, the form" of "which will be readily understood from Figs. 9*"ahd 1. The lever-103 is journaled upon a fixed pivot 103, said lever being also connected b a pivot 103 to "a bearing 81 encircling t e co1lar'81. The arrangement of parts is such that when the collar 81 and bearing 81 are drawn away from the hearing 77,1.the lever 103 is rocked upon its pivot 103, sovthat the arm 102 presses the clutch member 100- into engagement with the clutch member 99, thus securely locking the wheel 96 upon the shaft 97. The shaft 97 extends through a stationary bearing 10 1, and a tubular shaft 105 supports a portion of the' shaft 97. The tubular shaft105 is provided with a clutch member 106 secured rigidlythereupon',-and another clutch member-107 is splined upon the shaft 97. A spring 107* engages theclutch .member last mentioned, and also engages the bearing 104, so as to normally press the clutch member 107 to the left according to Fig. 1., A set collar 107" limits the axial travel of the clutch member 107. A hearing 108 encircles the tubular shaft 105 and supports the same. A ratchet wheel 109 is keyed firmly upon the tubular shaft 105 and is revoluble therewith. A pawl 110 is located above this ratchet and is adapted to engage thesame. 2A spool 111 is keyed upon the tubular shaft 105 and consequently isrevoluble therewith. w A fixed nut 112 is mountedupon'a pedesta1'113. The tubular shaft 105 is provided with a solid threaded portion 111v which extendsthro'ugh the nut 112, these parts heingso arranged that when the tubular shaft 105 is turned, it has "a progressive axial movement relatively to the pedestal 113'and other stationary parts. A spiralspring 114 encircles the threaded portion' 111*- of the .tubular shaft105. This spring, at one of its ends, engages the bearing 112, and at its other end is connected with the spool 111.

A rod 115=is pivotally. connected at one of its ends, to one end of the lever 103, said rod being provided with. a cam-surface 116, so that as it is moved in the general direction of its length it raises or lowers the. pawl 110, as, indicated by fulland clottedmoved endwise in such'direction as to lower 1 the pawl 110, and when the centrifugal action of the governor has ceased so that the lever 103 resumes its normal position, the ma 115 moves endwiseso that its'cam surface 116 raises the pawl 110, the latter then resting above the ratchet 109. A brace 117. extends from the'pedestal 113 to'another pedest-al120, and from the latter a brace 1.18 extends to a third pedestal 119, thepcdestals being employed to support various movable.-

parts above described. An oil trough is shown at 122,.the worm wheel 96 extending down' into said oil trough and being lubricated by aid thereof.

The result-of the above arrangement is that when the governor is idle or has only a slight motion, the pawl 110 is out of'engagement with the ratchet 109, but when the governor is in rapid motion, the pawl engages-the ratchet.

The operation of our device is as follows: We will suppose that at the start the various movable parts occupy their respective nor.-

electric mechanism is idle. If now a train rails 29,30, or the two rails 31, 32, as the case may be, the rails 29, 30, 31 and 32-b'eing insulated railsections, as required. 1 Sup.

'posingthat-v the rails-29, '30 are the ones affected, the following circuit is completed: 1 0' battery 45, wire 49, relay magnet 50,1wires 51-, -52, rail 30, approaching train, rail 29,- wires 47, t6, to battery 45. This energizes the relay magnet 50 and causes it to 313-- tract its armature 54. The contact tongues 55,56 are now brought into engagement with the'respective contact members 59, 60,

61, 62 with which they are associated. The following circuits are thus completed: a

source of electricity (not shown) connected with the wire 63, stationary contact member 59, contact tongue 56, stationary contact member 60, wire 60, lamps 27 (inparallel),

wire 60,wire 60", stationarycontact member 62, contacttongue 55, stationary contact member 61, wire 6-1, back tosonrrce of electricity. This lights the lamps 27. Anotheiucircuitto some extent common to the one preceding, isalso completed as follows: source of electricity, wire 63,station- 1,20

ary contact member 59, contact tongue 56, stationary contactinember 60, wire 60, electric motor 19, wire 60 ,-stationary contact member 62, contact tongue 55, stationary contactmember 61, wire 641, back to source 1215 of electricity. This current starts the electric motor 19 into action. This motor by 'aid of the belt- 121 turns the pulley 72; the

rotation of said pulley beginning practically. as soon as the lamps 27 are lighted. The 131) not turning the latter,

of the pulley 72 turns the shaft 69, and the bevel gear 73. The'rolh bevel gear causes the bevel gear nd shaft 76 to operate the governor.

-Whenthe current is first turned on, as just described, the rotary motion communica ed to the she t 69 and parts carried thereby is quite slight. The load now upon the shaft 69 is comparatively light, owing to the fact that the worm Wheel 96 see Fig. i} is loose relatively to the shaft 97 and is T he increasing speed oi the governor. however, soon causes the Weights 79 to move apart under centrifugal act-ion so that the strap 81 is drawn the left according to Fig. 1. This rocks the lever j 108 upon the pivot pm 103 and causes the 102 to force the clutch member 100 to the right according to Fig. 1. This brings the clutch member 100 into engagement with clutch member 99, and,therefore the ro- Potion of the Worm wheel 96 causes the shait I b l ZMGC llE ZllSm that the Worm Wheel 96 begins .0 turn rapidly before communicating any notion to the shaft 97, is to enable the elec- 113 motor before assuming the Work of cvw e e ouerating the gates to first acquire a good speed. Tie WOID1 Wheel 96 continues to gageinent with the clutch member 107,

which is unable to follow it on account of the set collar 107". tubular shaft 105 Winds the spring 114: and also turns the spool 111. The rotation of the spool Winds up the strap 26 and pulls the bar so as to stretch the springs 21 and draw the cords 21. As each cord 21 controls a pulley 31 (see Fig. 11), the drawing of all or" the cords turns the respective pulleys 31 so asto lower, or close the gates 16. In doing ibis, the doors 41, 43 of arcuate form associated with the casings. 1T, operate as above described and keep. these casings closed. T he turning of the pulley 31 raises the counterweights 3%, which are heavy enough to restore the gates to normal position as above explained.

its the governor rotates at its maximum speed, the rod 115- iindcr control of the lever 103, is moved relatively to the pawl 110, so that the cam surface 116 is shifted and the pav /#1110 is thus lowered with the ratchet 109. This o ore the clutch member 1 I am the clutch member l'fli'erthe disengagement or t just b hese to turn. Our'purpose in so arranging the The rotation of the into engagement bcrs takes place the shaft 105 is prevented iroin rotating backward, it being-unable to do so because the pawl 110 holds the ratchet 109. This leaves the gates and their immediate connections closed and for a time idle. The shaft 97, however, continues to rotate and to operate the governor at the maximum speed of the latter. This state oi ailairs will continue so long as the train is present.

Suppose now that the train takes its departure, the circuit above traced through the relay magnets is thus broken, because the train no longer connects together the rails 29, 30, forming a part of 9 .id circuit. The contact tongues 50 are disengaged from the stationary contact members associated with them. The circuit through the lamps is thus broken and the lights are conscquently extinguished. The electric motor 19 is dc'nergized because the circuit through it is broken consequently the governor and the shafts 96, 97 become idle As the governor stops running, its spring "(8 forces the collar 81 to the right according to Fig. at. The lever 103 is thus rocked upon its pivot 103. The arm 102 pulls the clutch member 100 out of engagement with the clutch niem-' ber 99. and in so doing, leaves these two clutch members in their respective normal positions as indicated in Fig. This however, is not all that occurs. T he movement of the lever 103 into its normal. position just described causes the rod 11-5 to move QIlClWlSG relatively to the cam 110. The cam surface 116 thus liftsthe pawl 110 out of. engagement with the ratchet 109. and as a consequence; the tubular shaft 105 is no longer restrained. Thespring 11% having been wound as above described, noW un Winds and in so doing causes the rotation of the spool 111.. This univind's the strap 26 and relaxes the'tension upon the flexible ca les 21. The counterweightsge'c, 37" (see big. 11) being heavier than the gate 16, are carried downward by gravity so that the gates are raised. All movable parts how occupy their respective normal positions as described at the beginning of the operation. p F

We do not limit ourselves to the particular form of mechanism here shown and described, as various changes may be made therein ithout departing from the spirit of our invention.

' Having now described our invention What We claim as new and desire to secure by Letters Patent is.:

, 1. in a gate operating mechanism, the combination "ofa revoluble shaft, a governor in operative relation therevvitln a second revoluble shaft, me ans controllable in and iii-part byrotetion of said secoud-rnenftioned shaft for 'connecting'said first-menpart by ccntrifugal'a'ction of said governor xtioned shaft for lowering a gate.

oemvo shaft tosaid secondmentioned shaft a disconnect ng the same therefrom, and hoses controllable by said second-mengovera secwith said .sccondmentioned shaft and driven thereby for the purpose o'factuating a gate, means for restoring said gate to its normal POEltlOl], and mechanism connected with said governor and controllable thereby for" te1nperarily rendering inactive said lastanentinned means.

ina gate operating mechanism, the combination of a revoluble shaft, means contr'ollable by the presence of atrain for turn ingv said rcvolublc shaft, a second revoluble shaft, clutch mechanism connecting said first-mentioned shaft and said second-men-v tinned shaft together, means controllable by said second-mentionedshaft formoving a gatein one direction, centrifugally operated governor mechanism in operative relation to said first-mentioned shaft and driven thereby,'and means controllable by saidcentrif ugally operated got-*ernor mechanism for temporarily holding said second-mentioned shaft in -a predetermined definite position.

4c. in a gate operating mechanism, the combination of a revoluble shaft, means coir trollable by the presence ofa train for turning the same, a second revoluble shaft, clutch mechanism for holding said first-mentioned shaft and said second mentioned shaft together so as to enable saidsecond-mentioned shaft to be driven by said firstmentioned shaft, mechanism connected with said second--menti:med shaft for closing a gate, :inechanism including a pawl for temporarily restraining said last-mentioned mechanism, and centrifugally operated mechanism connected to said firstanentio'ned' shaft and provided with means for shifting the posi tion of said pawl.

5 In a gate operating mechanism, the combination of a gate, pivotal mounting meanstherefor, an operating shaft, another shaft, clutch means for connecting said shafts together, flexible means connecting the other shaft to the'gate, and means aut0- matically operated by the other shaft to throw said clutch means out of connecting position after the other shaft has been turned to actuate the gate.

6 In a gate operatingmechanism, the

combination of a revoluble shaft,means' for.

operating said shaft, another shaft, means for connecting said shafts together, means onn ti g ,id other sha t to said v gate, ted by said other shaft afterthe ween actuated to. move the means re operating mechanism, thefor connecting said shafts outof engaged relation, and means engaging said other shaft to prevent the gate from returning to its original position. i

7. 111 a gate operating mechanism, the combination of a revoluble shaft, another shaft, mcans'for connecting said shafts to-' gether, means for connecting the said other shaft to the gate to lower the same, means operated by the movement of said other shaft to move themeans for connecting said shafts out of connecting position when the gate has been actuated, and means for engaging and holding said other shaft :afterthe gate has been actuated, to prevent the gate from returning. a

8. In a gate actuating mechanism, the combination of a gate, pivotal mounting means'for the same, said gate having counterweights to hold the same in open position, an operating shaft, another shaft, means for.

connecting said shaft-s together, means. for

connecting the said other shaft to the gate to lower the same, means operated by the other shaft after the gate has been lowered to move the means connecting the said shafts to disengaged position, and means for engaging said other shaft after the gatehas been lowered to prevent the counterweights from raising the same.

9. In a gate operating mechanism, the' combination of a gate, means for pivotally mounting the same, an operating shaft, another shaft, means for detachably connecting said shafts together, means for conneotmg said other shaft to the gate to actuate the same, a screw-threaded bearing for said other shaft, sald other shaft having screw threads thereon to' engage said bearing,

whereby the said shaft will be moved out ofengagement with the operating shaft after I the same has been turned to a certain extent,

and means for engaging sari other shaft to prevent the gate from returning to its original position.

10. In a gate operating mechanism, the" combination of a gate, pivotal mounting means therefor, an operating shaft, another shaft, means for det-achably connecting said i shafts, means for connecting said other shaft to the gate to actuate the same, means for automatically movingsaid other shaft out of engagement with the first shaft after the gate has been actuated, and meansflfor subsequently causing said shafts to return to connecting position. v 5 11. In a gate operating mechan1sm,- the' combinatioirof a gate, pivotal mounting means for the same, anoperating shaft, an-

other shaft, means for dtachably connecting said shafts together, means carried by the other shaft for engaging the gate and actuating th same, means-actuated by the shaft for. disengaging the same from the first shaft "after the same hasheen actuated, and resiliactuated, means for engaging the actuatin for holding ent means in position to be stressed by the movement of the shaft for returning said; shafts to engaging position.

12, In a gate operating mechanism, the combination of a gate, means for pw'otally mounting the same, an operatlngshaft,

means detachably engaging said shaft and connected. to said gate for actuating the gate, means controlled by said actuating means for disconnecting said actuating means in the operating shafhan'd means same has been actuated.

13. in gate operating mechanism, the combination of a gate, means for 'pivotally mounting the same, operating means, means fer actuating said gatQmeans for connecting said actuating means to the operating means, means controllable by the actuating means for disconnecting the actuatingmeans from the operating means after the gate has been means to prevent the return of the gate, ano means controllable by the operating means for allowin said means for preventing the return of the gate to come into engaging position With respect to the actuating means.

said gate in position after'the trifugal governor controlled by the operat g means for-releasing the pawl and al lo w ring the same to move into engaging position.

15.111 a gate-operating mechanism, the

. combination of a revoluble shat-t, a gate, means-for comiectmg the said gate to the shaft, means for operating the shaft to actuate the. gate, means carried by the shaft and the operating means for connecting said parts together, thesaid shaft having a screw;

threaded portioi nd. a bearing having" my responding thr 'IQCBIVG the said screwthreaded'portion, Where when the shaft has been turned a predetermined amount it W111 be disconnected from the operating v means. i

16.'In a gatebperating mechanism, the combination of a gate, means for actuztlting said. ate,v means for engaging the actuating means to lock the same after .the gate has 7 been actuated, and automatically-actuated.

means for controlling the locking means,

17. In a gate-operating mechanism, the combination of a gate, means for actuating the gate, a ratchet carried by said actuating Y 1 means, a pawl for engaging the ratchet after the gate has been actuatedyand automatic .means for controlling the pawl to enable the locking means to be locked and unlocked.

In testimony whereof We have signed our names to this specification in the presence of two subscribing Witnesses. JACOB E. C. JACOBSEN. CHARLES A. V. J. SEGERSTEX.

lVitnesses "W. H..F1snnn, W. VZIIMMERMAHN. 

